35-ft x 13-ft x 4-in = 5.62 cubic yards (rounded)
2.2 Yards
1.77 cubic yards
16.05
If it is 4 inches deep/thick, 2 cubic yards. If it is 6 inches deep/thick, 3 cubic yards.
12.30 cubic yards
2.2222222201902215 cubic yards
It is about 166.67 cubic feet and you will need just over 6.17 cubic yards of concrete.
25 feet by 13 feet by 4 inches deep = 4.01 cubic yards
That's just about 3.9 cubic yards for every 6 inches deep.
about 17 yards of concrete (it's sold by the cubic yard)
You need 1.11 cubic yards of cement.
9x12 feet at 4 inches deep: 1.3 cubic yards.